What is difference between factory and abstract factory?
The main difference between a “factory method” and an “abstract factory” is that the factory method is a single method, and an abstract factory is an object. The factory method is just a method, it can be overridden in a subclass, whereas the abstract factory is an object that has multiple factory methods on it.
Is abstract factory a factory of factories?
Abstract Factory patterns work around a super-factory which creates other factories. This factory is also called as factory of factories. This type of design pattern comes under creational pattern as this pattern provides one of the best ways to create an object.
How Abstract Factory pattern uses composition?
The Abstract factory pattern describes a method of individual fabrics composition, that are grouped together by some common criteria. Product — defines a product object to be created by the corresponding concrete factory. Client — uses only interfaces declared by AbstractFactory and Product classes.
What problem does Abstract Factory pattern solve?
The Abstract Factory design pattern solves problems like: How can an application be independent of how its objects are created? How can a class be independent of how the objects it requires are created? How can families of related or dependent objects be created?
Which is an example of an abstract factory pattern?
Abstract factory pattern implementation provides us a framework that allows us to create objects that follow a general pattern. So at runtime, abstract factory is coupled with any desired concrete factory which can create objects of desired type. UML class diagram example for the Abstract Factory Design Pattern.
How are abstract factories used in client software?
Client software creates a concrete implementation of the abstract factory and then uses the generic interfaces to create the concrete objects that are part of the family of objects. The client does not know or care which concrete objects it gets from each of these concrete factories since it uses only the generic interfaces of their products.
How are concrete factories implemented in abstract factory?
Concrete Factories implement creation methods of the abstract factory. Each concrete factory corresponds to a specific variant of products and creates only those product variants. Although concrete factories instantiate concrete products, signatures of their creation methods must return corresponding abstract products.
How does the abstract factory interface work in Java?
The Abstract Factory interface declares a set of methods for creating each of the abstract products. Concrete Factories implement creation methods of the abstract factory. Each concrete factory corresponds to a specific variant of products and creates only those product variants.